Wat Phra Kaew is located in the center of Bangkok on Na Phra Lan Road, Sanam Luang in the Phra Nakhon District. You can get there by bus. There are daily tours there from virtually every hotel in the city. Also you can visit Wat Pho (Temple of Reclining Buddha) which is next to Wat Phra Kaew and Grand Palace it in the same complex, so there would be a good “set” of Places to take in during one trip.